Helpp meee again ToT!

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9